They're called ghost nets, and they drift aimlessly through the oceans, killing anything that crosses their path. These nets once belonged to commercial fisherman, but were abandoned overboard, to live on for years, creeping through ocean currents in search of innocent victims.

When they've killed so many animals, they sink to the ocean floor with the weight of their prey, and let the elements devour the remains. Once the bodies ensnared within their ropes decompose, like Freddie Krueger in your worst nightmares, they rise up again to continue their dance of death beneath the waves.

THE END

...living near a fishing port, maybe we can learn ways from our fishing friends about how to eliminate these?